Water is the only substance found naturally in three forms: solid, liquid, and gas.
Ninety-seven percent of the earth's water is saltwater in oceans and seas. Of the 3% that is freshwater, only 1% is available for drinking - the remaining 2% is frozen in the ice caps.
Water makes up almost two-thirds of the human body, and seventy percent of the brain.
A person can live without food for a few weeks but a person can only live without water for a few days.